Image Steganography

La stéganographie est le processus consistant à cacher un message secret.

Steganography is not to be confused with Encryption, which is the process of making a message unintelligible—Steganography attempts to hide the existence of communication. The main advantage of steganography algorithm is because of its simple security mechanism. Because the steganographic message is integrated invisibly and covered inside other harmless sources, it is very difficult to detect the message without knowing the existence and the appropriate encoding scheme .

Encoding Algorithm:

Firstly, the secret message that is extracted is compressed as the contents in the compressed string will significantly hard to detect and read, furthermore it reduces the size of string.

Secondly, the compressed string is encrypted with the secret key.

Finally, encoding the encrypted message in the image. It uses LSB steganographic embedding to encode data into an image. Once the message is encoded the process stops.

Decoding Algorithm

Firstly, decode the message from the encrypted image using LSB decoding.

Secondly, decrypt the compressed message from the decoded message using the secret key.

Finally, decompress the message to get the original compressed message.